US2220965A - Seal - Google Patents

Description

Nay. 12, 1940. KOHL R' 7 2,220,965

SEAL

Filed May 4, 1958 2 Sheets-Sheet 2 6L 7 a 6 8 F7 a. 4

1 (/OSEPH/iM/ILEA IN VENTOR.

ATTORNEY.

Patented. Nov; 12, 1 1

sear. Joseph Kohler, Calumet City, Ill.

Application an 4.1938, Serial No. 205,892 I 4 (on. sac-s) This invention relates to an improved seal which is especially adapted-for use in conjunction with centrifugal pumps, valves, and the like.

However, it will be apparent fromthe following 5 detailed description that the usefulness of the improved seal of thisinvention is by no means v confined to such employment.

The improved seal of this invention is of the general type disclosedin my prior application ,for patent, Serial No. 45,171, which matured mm Patent No. 2,112,461, dated March 21, 1938.

One of the principal objects of theimproved device residesin the provision of means for feconomically producing a sturdy and emcient seal "which is practically indestructible.

Another and still further object of importance and advantage resides in the provislonof means I for employing the improved device on pumps or the like without altering or changing in any U manner the casing or stuillng boxes of the pump. Still another and further object of importance is the provision of means for employing, as an element of the improved 'seah-a sealing ring having a greater diameter than the diameter of the anterior of the stufling box. v 7

Another important object of the improved seal of this invention is the fact that it maybe attached to'the present type pumps having either 1 split or sleeve bearings. a An additional object of importance and advantime is the self-contained means for circulating a continuous flow of I lubricant over the bearing surfaces of-the sealing members. i i Additional objects of importance and advanbase will become apparent as the following detailed description progresses. reference being had to the accompanying. drawings, wherein Fig. 1 is a topplanview of a shaft seal of the improved device of this invention. parts thereof being broken away.

Fig. 2 is a. vertical section taken on line 2 -2 of Fig. 1, looking in the direction indicatedby the arrows.

cfFig.2. 4 Fig.5 is a top plan view of a slightly modified shown partly in section.

form of the improved seal in working position.

Fig. 6 is a front elevational view of the annular locking member. As shown in the drawings:

locking member l8.

Fig. 3 is a front elevational viewof the annular sealing member. Y i Fig. 4 is a vertical section taken on lined-4 a'more or less conventional pump casing having a stuillng box aperture formed in the end thereof.

Extending through the stuillng boxaperture I2 is a shaft II to which a portion-of the improved seal of'this invention is secured.

. i 5 Secured to the portion of the shaft within the stuillngbox I2 -is an annular locking member I.

.The locking member II is preferably secured to the shaft by means of set screws it. However,

it will be apparent that any other suitable means 1 may be employed for securing the two parts together. The locking member It is provided with a plurality of countersunk apertures 20, each of which "is adapted to receive the end of a helical spring 22. 18

Slidably' positioned on the shaft I4 and 'rotat-' I .able therewith is an annular element 24 which has'a plurality of pins 12 extending into the countersunk apertures 22. Projecting outwardly from a restricted portion of the peripheral surl0 face of the. annular element 24 is a plurality of studs. a

Positioned on the shaft II and in telescoping engagement with the annular element 241s an annular-sealing member 30. The annular sealing member is provided with a plurality of slots 32 which are in sliding engagement with the studs 28. The annular element and the sealing member 3!! are slliiable longitudinally of the shaft. Positioned onthe shaft l4 intermediate 80 the annular element 24 and the sealing member 30 is a packing element 34. as is best shown in Figs. 1 and 5. It will be apparent from the foregoing that the rotative movement of the shaft.

i4 and the locking member II is imparted to the I annular element 24 and the sealing member 30. In addition to the members rotating with the shaft, a force is exerted against the annular element 24 by the springs 22 urging it away from the V Formed in the working surface of the annular sealing member 30 is a plurality of segmentallyshaped recesses 36. As the member 30 rotates the recesses 28 are. adapted to convey oil to the bearing surfaces of the engaged surfaces of the seal- 5 -=ing member.

In the preferred construction of the invention, a spacing member 28 is positioned at the end of the casing l0. The spacing member "is provided-with an annular shoulder, which is best 50 shown in Fig. 1, and which extends into the stufflng box l2.

7 The opposite face of the spacing member 28 is provided with an annular groove,whichis clearly shown inFig. l. I

Secured to the end of the casing it by bolts 5;

' mental recesses 36 form essential elements there- I so" comes necessary without disturbing or removing the entire seal from the shaft. Moreover, this construction allows the sealing members 44 or ,88 to be replaced 'at a minimum expense.

Formed on the inner surface of the gland 42 is an annular shoulder 46 which is adapted to enter the groove in the spacingmeniber 38 and be secured thereto, as is best shown in Fig, 1.

A gasket member as shown is preferably positioned on each side of the spacing member 38. It is to be observed that the sealing surfaces of the members 38 and 44, as shown in the preferred embodiment in Fig. 1 may be of greater diameter than the diameter of the interior of the stu-fling box l2.

Formed in the working surf-ace of the sealing element 44 is a segmental groove 48. A passageway 58 extends from each end of the segmental groove 48 through aportion of the gland 42 and thence outwardly to the peripheral edge thereof. It will be apparent that the passageway 58 and the segmental groove 48, when the device is assembled, provide a passageway for conveying a lubricant to the working faces of the sealing members 38 and 44.

Secured inthe outer end of each passageway 28 is a pipe 52 which connects the passageway with an oil reservoir 54. The oil reservoirmay be drained or refilled as desired. In the modified form. of the deviceas shown in Fig. 5, the gland 42 is preferably a separate and more or less conventional member. In this con-- struction the oil passageways 58 are located in the intermediate members 56 and, in turn, connect with the passageways 58 to supply a lubricant to the "working faces of the sealing member.

In both the preferred and modified form of the invention, as shown in the drawings, the segof. These recesses 36 are of the same diameter and radius as the groove 48 and consequently follow the grove 48 as the sealing member 38 rotates.

It is apparent therefore that oil entering the' trifugal pump. Wlien thedevice isin operation,

oil is drawn fromthe reservoir 54 through-one of the passageways 58 into the groove 48-and the recesses 36, thus lubricating the working faces bf the sealing members 38 and 44. The circulating of the oil continues upwardly through the other passageway 58 through the pipe 52 to the reservoir 54. This forced circulation continues as long as the seal is in operation. Oil in the reservoir may be replenished or changed as desired. It will be apparent from the foregoing that herein is provided an efllcient and economically operated seal which includes a self-contained forced feed lubricating system.

. Moreover, the forced lubricating system is en tirely automatic in that the circulation of oil starts and stops with the starting and stopping of the device.

.It will be apparent to those skilled in the art to which theimproved. device of this invention appertains, that numerous changes in construction and design may be made, all without departing from the spirit or scope of the invention. Ao-

cordingly, it is understood that the patent granted hereon is not to be limited except as necessitated by the terminology of the appended claims when given a range of equivalents to which they may be entitled.

I claim as my invention:

1. The combination with a rotatable shaft, a casing having a' stufflng box through which said shaft extends, a locking ring positioned on said shaft and secured thereto, an annular element positioned on said shaft and movable longitudinally thereof, said locking ring and said annular element being in spaced relation but joined for rotation in unison, spring means urging said annular element and said locking ring apart, a sealing member positioned on the shaft and in telescoped relation with said annular element, said sealing member and saidannular element being said gland to the sealing surface thereof, said passageways opening onto the sealing surface of said gland at spaced apart pointsya segmental groove concentric with said gland extending from one of said passageway openings to the other, and

a plurality of impeller recesses in the sealing surface of said sealing member, said impeller recesses being positioned to operate in opposed relation to the entire segmental groove over which it travels. I

2. In a seal including a revolvable sealing member and a stationary sealing member in opposed relation one to the other, an oil passageway ex-' 'tending into and out of said stationary sealing member, said passageway including a groove in.

the face of said stationary sealing member, and a plurality of impeller recesses in the face of said revolvable sealing member coacting with said groove to provide means for circulating oil through said oil passageway and out of said sealing member.

3. In a seal including a revolvable sealing mem- I ber and a stationary sealing member in sealing contact one with the other, said stationary seal-.

ing member having an inlet passageway and an outlet passageway extending fromatmosphere to the sealing surface thereof, and coacting means formed in the sealing surfaces of said sealing members for collecting oil from said inlet and ex.- pelling the oil through said outlet passageway, said co-acting means comprising a plurality of impeller recesses positioned in spaced relation in the face of one seal-ing member and a segmental groove formedin the face of the opposed sealing member, said impeller recesses being positioned to operate in opposed relation to said segmental groove, the radii of said segmentalgroove and said impeller recesses being equal.

, 4. In a shaft seal including a stationary sealing member and a revolvable sealing member in sealing engagement, an. oil reservoir having .an inlet passageway leading to said sealing surfaces and an outlet passageway leading from said-sealing surfaces, and means for circulating oil through said passageways, said means comprising an oil'groove in said stationary member and a "plurality of impeller recesses formed in the face of the revolvable member.

JOSEPH H. KQHLER.

Images